The city set a timetable yesterday for expanding its search for remains at the World Trade Center.

Starting this week, workers will begin searching the rooftop of the Millenium Hotel, according to Deputy Mayor Ed Skyler.

Once that is complete, in about two weeks, workers will move to the rooftop of 1 Liberty Plaza.

Then in December, workers will begin searching the grounds of the former St. Nicholas Greek Orthodox Church at 140 Liberty St. and a section of the street known as “haul road,” because it was used by trucks to remove debris during the original cleanup effort.

Sources who worked at the site five years ago have told The Post they expect many remains to be found at the site of the Greek church, since it was paved over after it was destroyed.

Workers will continue to search for remains at the Deutsche Bank building and 12 manholes in the lower levels of the site.